/*!	 valuenode_sine.cpp
**	 Implementation of the "Sine" valuenode conversion.
**
**	Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
**	Copyright (c) 2007, 2008 Chris Moore
**  Copyright (c) 2011 Carlos López
**
**	This package is free software; you can redistribute it and/or
**	modify it under the terms of the GNU General Public License as
**	published by the Free Software Foundation; either version 2 of
**	the License, or (at your option) any later version.
**
**	This package is distributed in the hope that it will be useful,
**	but WITHOUT ANY WARRANTY; without even the implied warranty of
**	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
**	General Public License for more details.
**
*/

#ifdef USING_PCH
#	include "pch.h"
#else
#ifdef HAVE_CONFIG_H
#	include <config.h>
#endif

#include "valuenode_sine.h"
#include "valuenode_const.h"
#include <synfig/general.h>
#include <synfig/localization.h>
#include <synfig/valuenode_registry.h>

#endif

using namespace std;
using namespace etl;
using namespace synfig;

REGISTER_VALUENODE(ValueNode_Sine, RELEASE_VERSION_0_61_06, "sine", "Sine")

ValueNode_Sine::ValueNode_Sine(const ValueBase &value):
    LinkableValueNode(value.get_type())
{
    Vocab ret(get_children_vocab());
    set_children_vocab(ret);

    if (value.get_type() == type_real) {
        set_link("angle", ValueNode_Const::create(Angle::deg(90)));
        set_link("amp", ValueNode_Const::create(value.get(Real())));
    } else {
        throw Exception::BadType(value.get_type().description.local_name);
    }
}

LinkableValueNode*
ValueNode_Sine::create_new()const
{
    return new ValueNode_Sine(get_type());
}

ValueNode_Sine*
ValueNode_Sine::create(const ValueBase &x)
{
    return new ValueNode_Sine(x);
}

ValueNode_Sine::~ValueNode_Sine()
{
    unlink_all();
}

ValueBase
ValueNode_Sine::operator()(Time t)const
{
    if (getenv("SYNFIG_DEBUG_VALUENODE_OPERATORS")) {
        printf("%s:%d operator()\n", __FILE__, __LINE__);
    }

    return
        Angle::sin(
            (*angle_)(t).get(Angle())
        ).get() * (*amp_)(t).get(Real())
        ;
}

bool
ValueNode_Sine::check_type(Type &type)
{
    return type == type_real;
}

bool
ValueNode_Sine::set_link_vfunc(int i, ValueNode::Handle value)
{
    assert(i >= 0 && i < link_count());

    switch (i) {
    case 0:
        CHECK_TYPE_AND_SET_VALUE(angle_, type_angle);

    case 1:
        CHECK_TYPE_AND_SET_VALUE(amp_,   type_real);
    }

    return false;
}

ValueNode::LooseHandle
ValueNode_Sine::get_link_vfunc(int i)const
{
    assert(i >= 0 && i < link_count());

    if (i == 0) {
        return angle_;
    }

    if (i == 1) {
        return amp_;
    }

    return 0;
}

LinkableValueNode::Vocab
ValueNode_Sine::get_children_vocab_vfunc()const
{
    if (children_vocab.size()) {
        return children_vocab;
    }

    LinkableValueNode::Vocab ret;

    ret.push_back(ParamDesc(ValueBase(), "angle")
                  .set_local_name(_("Angle"))
                  .set_description(_("The angle where the sine is calculated from"))
                 );

    ret.push_back(ParamDesc(ValueBase(), "amp")
                  .set_local_name(_("Amplitude"))
                  .set_description(_("The value that multiplies the resulting sine"))
                 );

    return ret;
}